Hey, Perryvlle is my PD! In years past, I would ring the bell and get buzzed in by a trooper at the front desk (and there was ALWAYS a trooper at the front desk). Then, when I went again in more recent years, I was waiting for several minutes... before someone (I guess from another part of the building) finally came to the front desk to buzz me in.... leaving the impression that the front desk might not always be manned anymore (but there's still someone in the building to respond to visitors, because I'm sure the camera and buzzer go into different areas). Interactions btw have also been consistently courteous and professional.
I'm curious, did your friend ring the bell and wait for a response? I know some local police stations have moved to an unmanned status at different points of the day out of necessity (due to understaffing)... (happened in my prior town), but I'd be genuinely shocked if that was the case with a state police barracks alongside a major interstate! Yikes! I mean, I've read many times over the years that a common security rule is: if you believe a car is following you late at night, do NOT drive home... drive to the nearest police station instead. Well, sheesh... that advice doesn't really hold much water anymore, does it, if the police station is unmanned or even slow to respond to someone at their front door? So, I really hope your friend is wrong about Perryville! But I'm going to ask around locally and see what I can find out & I will report back if I learn something... because frankly, I'm now very curious about this myself, for all kinds of reasons.